showing results for - "how to read a file in javascript"
Elyes
24 Nov 2016
1// As with JSON, use the Fetch API & ES6
2fetch('something.txt')
3  .then(response => response.text())
4  .then(data => {
5  	// Do something with your data
6  	console.log(data);
7  });
Casey
27 Mar 2019
1const fileUrl = '' // provide file location
2
3fetch(fileUrl)
4   .then( r => r.text() )
5   .then( t => console.log(t) )
6
Anna
19 Jun 2020
1const fileList = event.target.files;
2let fileContent = "";
3
4const fr = new FileReader();
5fr.onload = () => {
6  fileContent = fr.result;
7  console.log('Commands', fileContent);
8}
9
10fr.readAsText(fileList[0]);
Mats
14 May 2020
1fetch('file.txt')
2  .then(response => response.text())
3  .then(text => console.log(text))
4  // outputs the content of the text file
5
Till
25 Sep 2017
1function readImage(file) {  //function readImage(file) {
2  // Check if the file is an image.
3  if (file.type && !file.type.startsWith('image/')) {
4    console.log('File is not an image.', file.type, file);
5    return;
6  }
7
8  const reader = new FileReader();
9  reader.addEventListener('load', (event) => {
10    img.src = event.target.result;
11  });
12  reader.readAsDataURL(file);
13} Check if the file is an image.  if (file.type && !file.type.startsWith('image/')) {    console.log('File is not an image.', file.type, file);    return;  }  const reader = new FileReader();  reader.addEventListener('load', (event) => {    img.src = event.target.result;  });  reader.readAsDataURL(file);}
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